Terminal device, base station device, method, and recording medium

ABSTRACT

A terminal device includes: an acquisition unit that acquires first control information and second control information provided in notification from a base station device; and a reception processing unit that performs reception processing of a first data channel scheduled to a first resource, and a reference signal for demodulating the first data channel, on the basis of the first control information, in which the reception processing unit performs the reception processing of the first data channel mapped to a resource other than a second resource that is a part of the first resource in the first resource on the basis of the second control information on the assumption that the reference signal is mapped to the first resource including the second resource.

TECHNICAL FIELD

The present disclosure relates to a terminal device, a base stationdevice, a method, and a recording medium.

BACKGROUND ART

Radio access scheme for cellular mobile communication and radio network(hereinafter, also referred to as “long term evolution (LTE)”,“LTE-advanced (LTE-A)”, “LTE-advanced pro (LTE-A Pro)”, “new radio(NR)”, “new radio access technology (NRAT)”, “evolved universalterrestrial radio access (EUTRA)”, or “further EUTRA (FEUTRA)”, havebeen considered in the third generation partnership project (3GPP). Notethat, in the following description, the LTE includes the LTE-A, theLTE-A Pro, and the EUTRA, and the NR includes the NRAT and the FEUTRA. Abase station device (base station) is also referred to as an evolvedNodeB (eNodeB) in the LTE, and is also referred to as a gNodeB in theNR. Furthermore, a terminal device (a mobile station, a mobile stationdevice, a terminal) is also referred to as a user equipment (UE) in theLTE and the NR. The LTE and the NR are cellular communication systems inwhich a plurality of areas covered by the base station device isarranged in a cell. A single base station device may manage a pluralityof cells.

The NR is a radio access technology (RAT) different from the LTE as anext-generation radio access scheme for the LTE. The NR is an accesstechnology that can support various use cases including the enhancedmobile broadband (eMBB), the massive machine type communications (mMTC),and the ultra reliable and low latency communications (URLLC). The NR isconsidered aiming at a technical framework corresponding to usagescenarios, requirements, deployment scenarios, and the like in those usecases. Details of the NR scenarios and requirements are disclosed inNon-Patent Document 1.

Here, the eMBB is broadband transmission, and data transmission isperformed in slot units. Furthermore, the URLLC includes low latencytransmission, and data transmission is performed in time units(minislots) shorter than slots. In other words, the transmission timeinterval (TTI) in the URLLC is shorter than the TTI in the eMBB.Therefore, data transmission of the URLLC may occur after datatransmission of the eMBB has already started. Although frequencydivision multiplexing can be considered as one of methods to multiplexeMBB data and URLLC data, it is necessary to secure frequency resourcesfor URLLC data transmission, and in a case where the occurrencefrequency of URLLC data transmission is low, resource utilizationefficiency will be reduced.

Therefore, in the NR, dynamic resource sharing between the eMBB and theURLLC is considered. In the dynamic resource sharing between the eMBBand the URLLC, in a case where data transmission of the URLLC occurs,the data of the URLLC is transmitted using (taking over) the resource inthe slot where the eMBB data is transmitted. In other words, the URLLCdata is mapped to the resource prior to the eMBB data and transmitted.In the eMBB data, resources used for URLLC data transmission (resourcestaken over) are punctured. Details of dynamic resource sharing betweenthe eMBB and the URLLC are disclosed in Non-Patent Document 2.

CITATION LIST Non-Patent Document

-   Non-Patent Document 1: 3rd Generation Partnership Project; Technical    Specification Group Radio Access Network; Study on Scenarios and    Requirements for Next Generation Access Technologies; (Release 14),    3GPP TR 38.913 V0.3.0 (2016-03). [Searched on Dec. 22, 2016],    Internet <URL:    http://www.3gpp.org/ftp/Specs/archive/38_series/38.913/38    913-030.zip>-   Non-Patent Document 2: R1-1611545, “Dynamic Resource Sharing for    eMBB/URLLC in DL,” Sony, 3GPP TSG RAN WG1 Meeting #87, October 2016.    [Searched on Dec. 22, 2016], Internet <URL:    http://www.3gpp.org/ftp/tsg_ran/WG1_RL1/TSGR1_87/Docs/R1-1611545.zip>

SUMMARY OF THE INVENTION Problems to be Solved by the Invention

In a case where data of different communication standards aretransmitted by resource sharing, such as dynamic resource sharingbetween the eMBB and the URLLC, it is desirable that each piece of datais correctly received at the receiving side. For example, it is assumedthat a part of resources for transmitting first data of a firstcommunication standard is punctured, and data of a second communicationstandard is transmitted in the punctured resource. In this case, when ademodulation reference signal for the first data (for example,demodulation reference signal (DMRS)) is also punctured, thecharacteristics for the first data are greatly affected.

Thus, the present disclosure provides a mechanism capable of improvingthe transmission efficiency of the entire system in a case where dynamicresource sharing is performed.

Solutions to Problems

According to the present disclosure, provided is a terminal deviceincluding: an acquisition unit that acquires first control informationand second control information provided in notification from a basestation device; and a reception processing unit that performs receptionprocessing of a first data channel scheduled to a first resource, and areference signal for demodulating the first data channel, on the basisof the first control information, in which the reception processing unitperforms the reception processing of the first data channel mapped to aresource other than a second resource that is a part of the firstresource in the first resource on the basis of the second controlinformation on the assumption that the reference signal is mapped to thefirst resource including the second resource.

Furthermore, according to the present disclosure, provided is a terminaldevice including: an acquisition unit that acquires third controlinformation provided in notification from a base station device; and areception processing unit that performs reception processing of a seconddata channel scheduled to a second resource that is a part of a firstresource on the basis of the third control information, in which thereception processing unit performs the reception processing on theassumption that the second data channel is mapped to a resource otherthan a third resource that is a part of the second resource in thesecond resource.

Furthermore, according to the present disclosure, provided is a basestation device including: a notification unit that notifies a firstterminal device of first control information associated with a firstresource for the first terminal device, and second control informationassociated with a second resource for a second terminal device that is apart of the first resource; a data channel transmission unit that maps afirst data channel to a resource other than the second resource in thefirst resource while scheduling the first data channel to the firstresource; and a reference signal transmission unit that maps a referencesignal for demodulating the first data channel to the first resourceincluding the second resource.

Furthermore, according to the present disclosure, provided is a basestation device including: a notification unit that notifies a secondterminal device of third control information associated with a secondresource for the second terminal device that is a part of a firstresource for a first terminal device; and a data channel transmissionunit that maps a second data channel to a resource other than a thirdresource that is a part of the second resource in the second resourcewhile scheduling the second data channel to the second resource.

Furthermore, according to the present disclosure, provided is a methodincluding: acquiring first control information and second controlinformation provided in notification from a base station device; andperforming, by a processor, reception processing of a first data channelscheduled to a first resource, and a reference signal for demodulatingthe first data channel, on the basis of the first control information,in which the performing the reception processing includes performing thereception processing of the first data channel mapped to a resourceother than a second resource that is a part of the first resource in thefirst resource on the basis of the second control information on theassumption that the reference signal is mapped to the first resourceincluding the second resource.

Furthermore, according to the present disclosure, provided is a methodincluding: acquiring third control information provided in notificationfrom a base station device; and performing, by a processor, receptionprocessing of a second data channel scheduled to a second resource thatis a part of a first resource on the basis of the third controlinformation, in which the performing the reception processing includesperforming the reception processing on the assumption that the seconddata channel is mapped to a resource other than a third resource that isa part of the second resource in the second resource.

Furthermore, according to the present disclosure, provided is a methodincluding: notifying a first terminal device of first controlinformation associated with a first resource for the first terminaldevice, and second control information associated with a second resourcefor a second terminal device that is a part of the first resource;mapping, by a processor, a first data channel to a resource other thanthe second resource in the first resource while scheduling the firstdata channel to the first resource; and mapping a reference signal fordemodulating the first data channel to the first resource including thesecond resource.

Furthermore, according to the present disclosure, provided is a methodincluding: notifying a second terminal device of third controlinformation associated with a second resource for the second terminaldevice that is a part of a first resource for a first terminal device;and mapping, by a processor, a second data channel to a resource otherthan a third resource that is a part of the second resource in thesecond resource while scheduling the second data channel to the secondresource.

Furthermore, according to the present disclosure, provided is arecording medium in which a program is recorded for causing a computerto function as: an acquisition unit that acquires first controlinformation and second control information provided in notification froma base station device; and a reception processing unit that performsreception processing of a first data channel scheduled to a firstresource, and a reference signal for demodulating the first datachannel, on the basis of the first control information, in which thereception processing unit performs the reception processing of the firstdata channel mapped to a resource other than a second resource that is apart of the first resource in the first resource on the basis of thesecond control information on the assumption that the reference signalis mapped to the first resource including the second resource.

Furthermore, according to the present disclosure, provided is arecording medium in which a program is recorded for causing a computerto function as: an acquisition unit that acquires third controlinformation provided in notification from a base station device; and areception processing unit that performs reception processing of a seconddata channel scheduled to a second resource that is a part of a firstresource on the basis of the third control information, in which thereception processing unit performs the reception processing on theassumption that the second data channel is mapped to a resource otherthan a third resource that is a part of the second resource in thesecond resource.

Furthermore, according to the present disclosure, provided is arecording medium in which a program is recorded for causing a computerto function as: a notification unit that notifies a first terminaldevice of first control information associated with a first resource forthe first terminal device, and second control information associatedwith a second resource for a second terminal device that is a part ofthe first resource; a data channel transmission unit that maps a firstdata channel to a resource other than the second resource in the firstresource while scheduling the first data channel to the first resource;and a reference signal transmission unit that maps a reference signalfor demodulating the first data channel to the first resource includingthe second resource.

Furthermore, according to the present disclosure, provided is arecording medium in which a program is recorded for causing a computerto function as: a notification unit that notifies a second terminaldevice of third control information associated with a second resourcefor the second terminal device that is a part of a first resource for afirst terminal device; and a data channel transmission unit that maps asecond data channel to a resource other than a third resource that is apart of the second resource in the second resource while scheduling thesecond data channel to the second resource.

According to the present disclosure, even in a case where the secondresource that is a part of the first resource is punctured, thereference signal for demodulating the first data channel mapped to thefirst resource is mapped also in the second resource. Therefore, adevice of which a receiving target is the first resource can receive thereference signal for demodulating the first data channel without lossand can use the reference signal for demodulating the first datachannel. This makes it possible to avoid characteristic degradation ofthe first data channel due to puncturing.

Effects of the Invention

As described above, according to the present disclosure, provided is amechanism capable of improving the transmission efficiency of the entiresystem in a case where dynamic resource sharing is performed. Note thatthe effect described above is not necessarily limitative, and any of theeffects shown in the present specification or other effects that can beunderstood from the present specification may be exhibited together withthe effect described above, or instead of the effect described above.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a diagram showing an overall configuration of a systemaccording to an embodiment of the present disclosure.

FIG. 2 is a diagram for explaining an example of typical dynamicresource sharing.

FIG. 3 is a diagram showing an example of a mapping pattern of an eMBBDMRS.

FIG. 4 is a diagram showing an example of a mapping pattern of an eMBBDMRS.

FIG. 5 is a block diagram showing a configuration example of a basestation device according to the present embodiment.

FIG. 6 is a block diagram showing a configuration example of an eMBBterminal according to the present embodiment.

FIG. 7 is a block diagram showing an example of a configuration of aURLLC terminal according to the present embodiment.

FIG. 8 is a sequence diagram showing an example of a flow of datacommunication processing of the eMBB executed in a system according tothe present embodiment.

FIG. 9 is a diagram showing an example of dynamic resource sharing indifferent DMRS mapping patterns according to the present embodiment.

FIG. 10 is a sequence diagram showing an example of a flow of datacommunication processing of the URLLC performed in a system according tothe present embodiment.

FIG. 11 is a diagram showing an example of dynamic resource sharing fordata of different subcarrier spacings according to the presentembodiment.

FIG. 12 is a sequence diagram showing an example of a flow of CSIfeedback processing executed in the system according to the presentembodiment.

FIG. 13 is a block diagram showing a first example of a schematicconfiguration of the eNB.

FIG. 14 is a block diagram showing a second example of a schematicconfiguration of the eNB.

FIG. 15 is a block diagram showing an example of a schematicconfiguration of a smartphone.

FIG. 16 is a block diagram showing an example of a schematicconfiguration of a car navigation device.

MODE FOR CARRYING OUT THE INVENTION

Preferred embodiments of the present disclosure will be described indetail below with reference to the accompanying drawings. Note that, inthe present specification and the drawings, the same reference numeralsare given to the constituent elements having substantially the samefunctional configuration, and redundant explanations are omitted.

Note that the description will be given in the following order.

1. Introduction

1.1. Overall Configuration

1.2. Dynamic Resource Sharing

1.3. Mapping Pattern of DMRS in NR

2. Configuration Example of Each Device

2.1. Configuration Example of Base Station Device

2.2. Configuration Example of eMBB Terminal

2.3. Configuration Example of URLLC Terminal

3. Technical Features

3.1. eMBB Processing

3.2. URLLC Processing

3.2.1. Case Where RE Sizes are the Same

3.2.2. Case Where RE Sizes are Different

3.2.3. CSI Feedback

4. Application Example

5. Conclusion

1. Introduction

<1.1. Overall Configuration>

FIG. 1 is a diagram showing an overall configuration of a systemaccording to an embodiment of the present disclosure. As shown in FIG.1, a system 1 includes a base station device 100, a terminal device 200,a terminal device 300, a core network 20, and a packet data network(PDN) 30.

The base station device 100 operates a cell 11 and provides a wirelesscommunication service to one or more terminal devices located inside thecell 11. The cell 11 is operated according to any wireless communicationscheme such as LTE or NR, for example. The base station device 100 isconnected to the core network 20. The core network 20 is connected tothe PDN 30 via a gateway device (not shown).

The core network 20 may include, for example, a mobility managemententity (MME), a serving gateway (S-GW), a PDN gateway (P-GW), a policyand charging rule function (PCRF), and a home subscriber server (HSS).The MME is a control node that handles control plane signals, andmanages the movement state of the terminal device. The S-GW is a controlnode that handles user plane signals, and is a gateway device thatswitches a transfer path of user data. The P-GW is a control node thathandles user plane signals, and is a gateway device serving as aconnection point between the core network 20 and the PDN 30. The PCRF isa control node that performs control on policies such as the quality ofservice (QoS) for a bearer, and charging. The HSS is a control node thathandles subscriber data and performs service control.

The terminal device 200 and the terminal device 300 wirelesslycommunicate with the base station device 100 on the basis of control bythe base station device 100. The terminal device 200 and the terminaldevice 300 may be so-called user terminals (user equipment (UE)). Forexample, the terminal device 200 and the terminal device 300 transmituplink signals to the base station device 100 and receive downlinksignals from the base station device 100.

In particular, the terminal device 200 is an eMBB terminal thattransmits and receives an eMBB signal to and from the base stationdevice 100. Furthermore, the terminal device 300 is a URLLC terminalthat transmits and receives a URLLC signal to and from the base stationdevice 100.

<1.2. Dynamic Resource Sharing>

Resources for communication may be divided and used in blocks havingpredetermined time intervals and predetermined frequency intervals. Suchblocks are also referred to as resource blocks (RBs). The RB may includeone or more subframes or slots in the time direction. Furthermore, theRB includes a set of subcarriers in the frequency direction. Note thatthe frequency interval of the RB may be referred to as a resource block.

In the NR, data with different transmission time interval (TTI) lengths,such as the eMBB and the URLLC, may be flexibly transmitted.Furthermore, in order to improve the utilization efficiency of frequencyresources, a plurality of pieces of data with different TTI lengths maybe transmitted by dynamic resource sharing in a predetermined resource.

FIG. 2 is a diagram for explaining an example of typical dynamicresource sharing. The horizontal axis in FIG. 2 is time, the verticalaxis is frequency, and one RB 40 is shown. In the RB 40 shown in FIG. 2,the eMBB data and the eMBB DMRS are transmitted. However, some resourcesin the RB are punctured, and data of the URLLC is transmitted in thepunctured resources. In other words, in the dynamic resource sharingbetween the eMBB and the URLLC, the URLLC data is preferentiallytransmitted, and part of the eMBB data is punctured.

During the dynamic resource sharing, puncturing may be performed.Puncturing refers to removing (in other words, dropping) a data symbolof a resource element (RE) to be punctured. In other words, data symbolsfor the punctured receiving device are not mapped to the resourceelement to be punctured.

In a case where the receiving device does not know that puncturing isperformed, reception processing is performed including also the datasymbol of the RE to be punctured, and the error rate characteristic isdegraded. In particular, in a case where high reliability communicationis required, such as the URLLC, it is desirable that such characteristicdegradation be avoided.

On the other hand, in a case where the receiving device knows thatpuncturing is performed, reception processing is performed assuming thatthe data symbol of the RE to be punctured is not received, and the errorcharacteristic degradation can be avoided. For example, informationassociated with puncturing for the eMBB data may be provided innotification by control information (for example, control channel)mapped to a predetermined resource. For example, information associatedwith puncturing performed in an RB may be provided in notification bycontrol information mapped to a last symbol of the RB, a PDCCH region inan RB at a time later than the RB, or the like.

In the example shown in FIG. 2, the eMBB DMRS may be transmitted usingfour REs 41A to 41D in one RB. However, although the eMBB DMRS istransmitted in the two REs 41A and 41B in the first half, the two REs41C and 41D in the second half are punctured for the data transmissionof the URLLC and the eMBB DMRS is not transmitted. The DMRS is importantfor reception processing on the receiving side since the DMRS is areference signal for estimating transmission line fluctuation for data.Therefore, as in the example shown in FIG. 2, in a case where the eMBBDMRS is punctured, the transmission characteristic is degraded even ifthe information associated with the puncturing for the eMBB data isprovided in notification.

Therefore, it is desirable to provide a mechanism for preventingdegradation of the transmission characteristic of data on the puncturedside in the dynamic resource sharing.

<1.3. Mapping Pattern of DMRS in NR>

In the NR, a plurality of types of DMRS mapping patterns are defineddepending on the moving speed of the UE, use cases, or the like, andthese may be switched and used. An example of the mapping patterns ofthe eMBB DMRS will be described below with reference to FIGS. 3 and 4.

FIGS. 3 and 4 are diagrams showing an example of the mapping patterns ofthe eMBB DMRS. In these examples, the horizontal axis is time, thevertical axis is frequency, and one rectangle is the RE including onesubcarrier and one symbol. Furthermore, it is assumed that one slotincludes seven symbols.

In FIG. 3, the DMRSs corresponding to antenna ports 1 to 4 are mapped tothe third symbol. In FIG. 4, the DMRSs corresponding to antenna ports 1to 4 are mapped to the third and seventh symbols. The DMRS shown in FIG.3 is suitable in a case where transmission line fluctuation in the timedomain is slow, and has less DMRS overhead than that in a case of theDMRS shown in FIG. 4. The DMRS shown in FIG. 4 is suitable in a casewhere transmission line fluctuation in the time domain is fast, and hasbetter receiving characteristics at high speed movement than in a caseof the DMRS shown in FIG. 3.

Furthermore, FIGS. 3 and 4 show a case where the DMRSs corresponding toantenna ports 1 to 4 are mapped, but the number of layers (the number ofspace multiplexing) of multi-input multi-output (MIMO) in the PDSCH maycause the mapping of the DMRSs to fluctuate.

For example, in a case where the layer number of the PDSCH is 1, DMRSsassociated with the PDSCH are mapped to only the antenna port 1 andtransmitted. In other words, in that case, the REs corresponding to theDMRSs of the antenna ports 2 to 4 may be used for the PDSCHtransmission. Furthermore, for example, in a case where the number ofPDSCH layers is two, the DMRSs associated with the PDSCH are mapped onlyto the antenna ports 1 and 2 and transmitted. In other words, in thatcase, the REs corresponding to the DMRSs of the antenna ports 3 and 4may be used for the PDSCH transmission. Furthermore, for example, in acase where the number of PDSCH layers is three, the DMRSs associatedwith the PDSCH are mapped only to the antenna ports 1 to 3 andtransmitted. In other words, in that case, the REs corresponding to theDMRSs of the antenna port 4 may be used for the PDSCH transmission.Furthermore, for example, in a case where the number of PDSCH layers isfour, the DMRSs associated with the PDSCH are mapped with all theantenna ports 1 to 4 and transmitted.

As described above, regarding the eMBB DMRS, in addition to a pluralityof types of mapping patterns of the DMRS, the mapping of the DMRS usedfor actual transmission fluctuates depending on the number of PDSCHlayers.

2. Configuration Example of Each Device

A configuration example of each device will be described below withreference to FIGS. 5 to 7.

<2.1. Configuration Example of Base Station Device>

FIG. 5 is a block diagram showing a configuration example of the basestation device 100 according to the present embodiment. Referring toFIG. 5, the base station device 100 includes an antenna unit 110, awireless communication unit 120, a network communication unit 130, astorage unit 140, and a processing unit 150.

(1) Antenna Unit 110

The antenna unit 110 radiates the signal output from the wirelesscommunication unit 120 into space as a radio wave. Furthermore, theantenna unit 110 converts a radio wave in space into a signal, andoutputs the signal to the wireless communication unit 120.

(2) Wireless Communication Unit 120

The wireless communication unit 120 transmits and receives signals. Forexample, the wireless communication unit 120 transmits a downlink signalto the terminal device and receives an uplink signal from the terminaldevice.

(3) Network Communication Unit 130

The network communication unit 130 transmits and receives information.For example, the network communication unit 130 transmits information toother nodes and receives information from other nodes. For example, theother nodes include other base stations and core network nodes.

(4) Storage Unit 140

The storage unit 140 temporarily or permanently stores programs foroperation of the base station device 100 and various pieces of data.

(5) Processing Unit 150

The processing unit 150 provides various functions of the base stationdevice 100. The processing unit 150 includes a notification unit 151, adata channel transmission unit 153, and a reference signal transmissionunit 155. The notification unit 151 notifies the eMBB terminal 200 andthe URLLC terminal 300 of control information. The data channeltransmission unit 153 transmits the eMBB data to the eMBB terminal 200.Furthermore, the data channel transmission unit 153 transmits the URLLCdata to the URLLC terminal 300. The reference signal transmission unit155 transmits the reference signal for demodulating the eMBB data to theeMBB terminal 200. Furthermore, the reference signal transmission unit155 transmits, to the URLLC terminal 300, the reference signal fordemodulating the URLLC data.

Note that the processing unit 150 may further include other componentsin addition to these components. In other words, the processing unit 150may also perform operations other than the operations of thesecomponents.

<2.2. Configuration Example of eMBB Terminal>

FIG. 6 is a block diagram showing a configuration example of the eMBBterminal 200 according to the present embodiment. Referring to FIG. 6,the eMBB terminal 200 includes an antenna unit 210, a wirelesscommunication unit 220, a storage unit 230, and a processing unit 240.

(1) Antenna Unit 210

The antenna unit 210 radiates the signal output from the wirelesscommunication unit 220 into space as a radio wave. Furthermore, theantenna unit 210 converts a radio wave in space into a signal, andoutputs the signal to the wireless communication unit 220.

(2) Wireless Communication Unit 220

The wireless communication unit 220 transmits and receives signals. Forexample, the wireless communication unit 220 receives a downlink signalfrom the base station and transmits an uplink signal to the basestation.

(3) Storage Unit 230

The storage unit 230 temporarily or permanently stores programs foroperation of the eMBB terminal 200 and various pieces of data.

(4) Processing Unit 240

The processing unit 240 provides various functions of the eMBB terminal200. The processing unit 240 includes an acquisition unit 241 and areception processing unit 243. The acquisition unit 241 acquires controlinformation provided in notification from the base station device 100.The reception processing unit 243 performs eMBB data receptionprocessing on the basis of the control information acquired by theacquisition unit 241.

Note that the processing unit 240 may further include other componentsin addition to these components. In other words, the processing unit 240may perform operations other than the operations of these components.

<2.3. Configuration Example of URLLC Terminal>

FIG. 7 is a block diagram showing an example of a configuration of aURLLC terminal 300 according to the present embodiment. Referring toFIG. 7, the URLLC terminal 300 includes an antenna unit 310, a wirelesscommunication unit 320, a storage unit 330, and a processing unit 340.

(1) Antenna Unit 310

The antenna unit 310 radiates the signal output from the wirelesscommunication unit 320 into space as a radio wave. Furthermore, theantenna unit 310 converts a radio wave in space into a signal, andoutputs the signal to the wireless communication unit 320.

(2) Wireless Communication Unit 320

The wireless communication unit 320 transmits and receives signals. Forexample, the wireless communication unit 320 receives a downlink signalfrom the base station and transmits an uplink signal to the basestation.

(3) Storage Unit 330

The storage unit 330 temporarily or permanently stores programs foroperation of the URLLC terminal 300 and various pieces of data.

(4) Processing Unit 340

The processing unit 340 provides various functions of the URLLC terminal300. The processing unit 240 includes an acquisition unit 341 and areception processing unit 343. The acquisition unit 341 acquires controlinformation provided in notification from the base station device 100.The reception processing unit 343 performs URLLC data receptionprocessing on the basis of the control information acquired by theacquisition unit 341.

Note that the processing unit 340 may further include other componentsin addition to these components. In other words, the processing unit 340may also perform operations other than the operations of thesecomponents.

3. Technical Features

<3.1. eMBB Processing>

The eMBB terminal 200 receives eMBB data. The operation of the eMBBterminal 200 in a case where puncturing is performed will be describedbelow.

(1) Puncturing

The eMBB terminal 200 recognizes that a part of resources for the eMBBdata is punctured by the URLLC data.

Here, in a case where dynamic resource sharing of the URLLC and the eMBBis supported, the RE to which the eMBB DMRS is mapped is not a target ofpuncturing. In other words, the eMBB DMRS is transmitted without beingpunctured. Therefore, the eMBB terminal 200 can receive the eMBB DMRSand use the eMBB DMRS for demodulation.

(2) Control Information

The eMBB terminal 200 (for example, the acquisition unit 241) acquiresfirst control information and second control information provided innotification from the base station device 100. Then, the eMBB terminal200 performs reception processing on the basis of the first controlinformation and the second control information.

The first control information includes information associated with aresource (also referred to as a first resource) on which the eMBB datais scheduled. In other words, the first control information includescontrol information provided in notification for scheduling (in otherwords, assignment) of the eMBB data (corresponding to the first datachannel). The first resource may be taken as a time resource or sectionfor which the eMBB data is scheduled.

The second control information includes control information associatedwith a resource (in other words, a second resource) to which the eMBBdata is not actually mapped in the resource for which the eMBB data isscheduled. In other words, the second control information includesinformation associated with the punctured resource in the firstresource. In the second resource, the URLLC data (corresponding to thesecond data channel) scheduled to the URLLC terminal 300 (correspondingto another device) communicating with the base station device 100 ismapped. The second resource may be taken as a time resource or sectionfor which the URLLC data is scheduled.

Here, the second control information may be transmitted at a time laterthan the first control information. This is because a request for URLLCdata transmission may occur after eMBB data transmission is started. Inaddition, it is preferable that the second control information beprovided in notification prior to the notification of the responseinformation (Ack/Nack information) for the data assigned by the firstcontrol information.

For example, the second control information may be transmitted in aresource block (in other words, a slot) including the resource beingpunctured. Specifically, the second control information may betransmitted in the last symbol in the resource block (in other words, aslot) including the resource being punctured. In this case, the secondcontrol information may be provided in notification using a physicalchannel different from the control channel used to provide notificationof the first control information.

For example, the second control information may be transmitted in aresource block (in other words, a slot) after a resource block (in otherwords, a slot) including the resource being punctured. In this case, thesecond control information may be provided in notification using thesame physical channel as the control channel used to providenotification of the first control information. Furthermore, the secondcontrol information may be transmitted by being included in the firstcontrol information provided in notification in a resource block (inother words, a slot) after a resource block (in other words, a slot)including the resource being punctured.

(3) Transmission Processing

The base station device 100 (for example, the notification unit 151)notifies the eMBB terminal 200 of the first control information and thesecond control information.

The base station device 100 (for example, the data channel transmissionunit 153) transmits eMBB data to the eMBB terminal 200. Specifically,the base station device 100 maps eMBB data to a resource other than thesecond resource in the first resource while scheduling the eMBB data tothe first resource. In other words, the base station device 100punctures the second resource from the first resource, maps the eMBBdata to the non-punctured resource in the first resource, and transmitsthe result.

The base station device 100 (for example, the reference signaltransmission unit 155) transmits, to the eMBB terminal 200, a referencesignal (in other words, eMBB DMRS) for demodulating the eMBB data. Inparticular, the base station device 100 maps the eMBB DMRS to the firstresource including the second resource. In other words, the base stationdevice 100 does not set the resource to which the eMBB DMRS is mapped asa target of puncturing for the URLLC data.

(4) Reception Processing

The eMBB terminal 200 performs reception processing on the basis of thefirst control information and the second control information.

Basically, on the basis of the first control information, the eMBBterminal 200 performs reception processing of the eMBB data scheduled tothe first resource and the reference signal for demodulating the eMBBdata (in other words, eMBB DMRS).

However, in a case where URLLC data is transmitted in a resource inwhich the eMBB data is scheduled, in other words, the first resource maybe punctured. In that case, on the basis of the second controlinformation, the eMBB terminal 200 performs reception processing of thefirst data channel to which a resource other than the second resourcethat is a part of the first resource in the first resource is mapped, onthe assumption that the eMBB DMRS is mapped to the first resourceincluding the second resource. In other words, the eMBB terminal 200performs reception processing on the assumption that REs other than theREs to which the eMBB DMRS is mapped are punctured in the resource to bepunctured designated by the second control information. More simply, theeMBB terminal 200 performs reception processing on the assumption thateMBB DMRS is not punctured. Therefore, the eMBB terminal 200 handles thesignal received in the RE that is assumed to be mapped with the eMBBDMRS, as the eMBB DMRS even if the RE is included in the secondresource.

As described above, even in a case where dynamic resource sharing isperformed, the eMBB DMRS is not punctured, and therefore, it is possibleto avoid the degradation of the eMBB data transmission characteristic.

The eMBB terminal 200 transmits response information to the base stationdevice 100 on the basis of the result of the reception processing. TheeMBB terminal 200 transmits, to the base station device 100, responseinformation for data assigned by the first control information. In acase where the eMBB terminal 200 receives the second control informationbefore transmitting the response information, the eMBB terminal 200transmits the response information associated with the received data inthe resources other than the resource to be punctured indicated by thesecond control information in the resource indicated by the firstcontrol information.

(5) Processing Flow

An example of the flow of eMBB data communication processing will bedescribed below with reference to FIG. 8.

FIG. 8 is a sequence diagram showing an example of a flow of datacommunication processing of the eMBB executed in the system 1 accordingto the present embodiment. The base station device 100 and the eMBBterminal 200 are involved in this sequence.

First, the base station device 100 transmits the first controlinformation to the eMBB terminal 200 (step S102). Next, the base stationdevice 100 transmits the eMBB data to the eMBB terminal 200 in the firstresource indicated by the first control information (step S104). Next,the base station device 100 transmits the second control information tothe eMBB terminal 200 (step S106). Then, the eMBB terminal 200 performsreception processing on the basis of the first control information andthe second control information, and transmits response information forthe received eMBB data to the base station device 100 (step S108).

<3.2. URLLC Processing>

<3.2.1. In a Case where RE Size is the Same>

(1) Overview

The URLLC terminal 300 performs reception processing on the resource towhich the URLLC data is mapped, and acquires the URLLC data.

As described above, even in a case where dynamic resource sharing isperformed, eMBB DMRS is not punctured. In other words, the RE to whicheMBB DMRS is mapped is punctured from the second resource. Thepuncturing for the second resource may also be referred to as REpuncturing.

Here, in the eMBB, a plurality of types of DMRS mapping patterns aredefined depending on the moving speed of the UE, use cases, or the like,and these may be switched and used. The DMRS mapping pattern may bedetermined independently for each UE. Since those UEs aretime-multiplexed and frequency-multiplexed, the DMRS mapping patternsmay be different in both time direction and frequency direction.Furthermore, in a case where REs to which DMRSs are mapped are differentfor each antenna port, DMRS mappings may also differ depending on thenumber of PDSCH layers. This point will be specifically described withreference to FIG. 9.

FIG. 9 is a diagram showing an example of dynamic resource sharing indifferent DMRS mapping patterns according to the present embodiment. Thehorizontal axis of FIG. 9 is time, the vertical axis is frequency, andthree RBs 40A, 40B, and 40C that are successive in the time directionare shown. As shown in FIG. 9, in the RB40A, eMBB DMRSs are mapped tofour REs, in the RB40B, eMBB DMRSs are mapped to six REs, and in theRB40C, eMBB data and eMBB DMRS are not transmitted. Furthermore, in eachRB, URLLC data is transmitted.

In this example, since the mapping patterns of eMBB DMRS in the URLLCdata are different, the puncturing pattern for the URLLC data is alsodifferent. Therefore, it is preferable that the URLLC terminal 300recognize a mapping pattern of the eMBB DMRS (or the puncturing patternfor the URLLC data) that may be different for each RB.

(2) Relationship between eMBB RE and URLLC RE

In the second resources, a resource to which URLLC data is not mapped(in other words, a resource to be punctured) is also referred to as athird resource. Furthermore, the RE to which eMBB DMRS is mapped is alsoreferred to as a fourth resource. Then, the third resource includes afourth resource to which the eMBB DMRS for demodulating the eMBB datamapped to the resource other than the second resource in the firstresource is mapped. That is, the third resource is arranged so as tohave the same size as the fourth resource and match the fourth resource,or arranged so as to have a size larger than the fourth resource andinclude the fourth resource.

Here, the size (in other words, the subcarrier spacing and/or the symbollength) may be the same or different between the eMBB RE and the URLLCRE.

In a case where the sizes of the eMBB RE and the URLLC RE are the same,the subcarrier spacing of the third resource is the same as thesubcarrier spacing of the fourth resource, and the symbol length of thethird resource is the same as the symbol length of the fourth resource.Then, in a case where the sizes of the eMBB RE and the URLLC RE are thesame, the third resource and the fourth resource match. This case willbe described in detail later with reference to FIG. 9.

On the other hand, in a case where the sizes of the eMBB RE and theURLLC RE are different, the subcarrier spacing of the third resource isdifferent from the subcarrier spacing of the fourth resource, and/or thesymbol length of the third resource is different from the symbol lengthof the fourth resource. Then, in a case where the sizes of the eMBB REand the URLLC RE are different, the third resource and the fourthresource may not match. This case will be described in detail later withreference to FIG. 11.

In this section, the case where the sizes of the eMBB RE and the URLLCRE are the same will be described. On the other hand, the case where thesizes of the eMBB RE and the URLLC RE are different will be described in<3.2.2. Case Where RE Size is Different>.

(3) Transmission Processing

The base station device 100 (for example, the notification unit 151)notifies the URLLC terminal 300 (corresponding to the second terminaldevice) of the third control information. The third control informationincludes information associated with the second resource for the URLLCterminal 300 (corresponding to the second terminal device) that is apart of the first resource for the eMBB terminal 200 (corresponding tothe first terminal device). More specifically, the third controlinformation includes information associated with the resource for whichthe URLLC data is scheduled.

The base station device 100 (for example, the notification unit 151) maynotify the URLLC terminal 300 of fourth control information includingURLLC data reception setting information as described later.

The base station device 100 (for example, the data channel transmissionunit 153) transmits the URLLC data to the URLLC terminal 300.Specifically, the base station device 100 maps the URLLC data to theresource other than the third resource that is a part of the secondresource in the second resource, while scheduling the URLLC data to thesecond resource. In other words, the base station device 100 puncturesthe third resource from the second resource, maps the URLLC data to thenon-punctured resource in the second resource, and transmits the result.

(4) Reception Processing

The URLLC terminal 300 (for example, the acquisition unit 341) acquiresthe third control information provided in notification from the basestation device 100.

Then, the URLLC terminal 300 (for example, the reception processing unit343) performs the reception processing of the second data channelscheduled to the second resource that is a part of the first resource onthe basis of the third control information.

However, the URLLC terminal 300 performs the reception processing inconsideration of RE puncturing for the second resource. Specifically,the URLLC terminal 300 performs reception processing on the assumptionthat the second data channel is mapped to the resource other than thethird resource that is a part of the second resource in the secondresource. In other words, the URLLC terminal 300 performs receptionprocessing on the assumption that the RE to which the eMBB DMRS ismapped is punctured from the second resource specified by the thirdcontrol information. That is, the URLLC terminal 300 handles REs assumedto be mapped with the eMBB DMRS as REs not to be received. As describedabove, the URLLC terminal 300 can avoid characteristic degradation ofthe URLLC data by excluding the eMBB DMRS from reception targets.

The URLLC terminal 300 receives the URLLC data on the basis of the URLLCdata reception setting information that is the setting informationassociated with the mapping of the URLLC data.

The URLLC data reception setting information is information associatedwith a resource (in other words, a third resource) to which the URLLCdata is not mapped in the second resource. In other words, the URLLCdata reception setting information is information associated with aresource to be punctured in the second resource.

The URLLC data reception setting information may include informationindicating a mapping pattern of the eMBB DMRS (in other words,information indicating a fourth resource). In that case, the URLLCterminal 300 performs the reception processing by puncturing the REcorresponding to the mapping pattern of the eMBB DMRS among the REs ofthe second resource. In other words, the URLLC terminal 300 performsreception processing on REs other than REs corresponding to the mappingpattern of the eMBB DMRS among the REs of the second resource. Notethat, hereinafter, the mapping pattern of the eMBB DMRS may also besimply referred to as a mapping pattern.

The URLLC data reception setting information may include informationindicating a puncturing pattern for the URLLC data in the secondresource (in other words, information indicating the third resource). Inthat case, the URLLC terminal 300 performs reception processing on REsother than the punctured RE among the REs of the second resource. Notethat, hereinafter, the puncturing pattern for the URLLC data in thesecond resource may be simply referred to as a puncturing pattern.

(2) Recognition Method of URLLC Data Reception Setting Information

The URLLC terminal 300 may recognize the URLLC data reception settinginformation, in other words, information indicating the third resourceor information indicating the fourth resource in various methods.

Recognition Based on Specifications

The fourth resource may be predefined. In other words, the thirdresource may be predefined.

For example, the mapping pattern of the eMBB DMRS may be predefined inthe specification. In that case, the URLLC terminal 300 performs thereception processing by puncturing the RE corresponding to the mappingpattern of the eMBB DMRS predefined according to the specification amongthe REs of the second resource.

The URLLC terminal 300 may perform reception processing on theassumption that the RE corresponding to the RE of the mapping patternpredefined is punctured regardless of the actual mapping of the eMBBDMRS.

The predefined mapping pattern may be determined on the basis of one ora plurality of mapping patterns among the mapping patterns of the eMBBDMRS defined in the specification. For example, the predefined mappingpattern may be determined on the basis of the mapping pattern of theeMBB DMRS defined by a predetermined subcarrier spacing (for example, 15kHz). For example, the predefined mapping pattern may be determined onthe basis of the mapping pattern of the eMBB DMRS that the eMBB terminal200 uses as a default value.

In the predefined mapping pattern, the number of antenna ports to bepunctured (or antenna port numbers) may be further defined. Furthermore,the number of antenna ports to be punctured (or antenna port numbers)may be set through radio resource control (RRC) signaling or downlinkcontrol information (DCI) signaling.

Recognition Based on Notification or Settings

For example, the URLLC data reception setting information (in otherwords, information indicating the third resource or informationindicating the fourth resource) may be provided in notification or setas fourth control information. In that case, the URLLC terminal 300acquires the URLLC data reception setting information provided innotification or set, and performs reception processing on the basis ofthe acquired URLLC data reception setting information.

The URLLC terminal 300 may recognize the URLLC data reception settinginformation based on notification or setting in various methods.Hereinafter, first to third examples will be described as an example.

Common Matters

First, matters common to the first to third examples will be described.

The URLLC terminal 300 performs reception processing by puncturing apredetermined RE determined on the basis of the mapping pattern setand/or provided in notification.

The mapping pattern set and/or provided in notification may bedetermined on the basis of one or a plurality of mapping patterns amongthe mapping patterns of the eMBB DMRS defined in the specification.

In the mapping pattern set and/or provided in notification, the numberof antenna ports to be punctured (or antenna port numbers) may befurther defined. Furthermore, the number of antenna ports to bepunctured (or antenna port number) may be set through RRC signaling orDCI signaling.

First Example

The URLLC data reception setting information may be provided innotification semi-statically by RRC signaling, and may be setcell-specifically or UE-specifically.

The URLLC data reception setting information may be individually set foreach RB or each RB group (frequency resource including a predeterminednumber of RBs) in the frequency domain.

In a case where the URLLC data reception setting information is not set,the URLLC terminal 300 performs reception processing by puncturing apredetermined RE determined on the basis of a predefined mappingpattern.

Second Example

The URLLC data reception setting information may be provided innotification dynamically by DCI signaling, and may be provided innotification cell-specifically, UE group-specifically, orUE-specifically. In other words, the URLLC data reception settinginformation may be provided in notification by being included in the DCIgenerated using a cell-specific, UE group-specific, or UE-specific radionetwork temporary identifier (RNTI).

The URLLC data reception setting information may be provided innotification periodically for every slot, every subframe, every slotgroup (a set of a predetermined number of consecutive slots), everysubframe group (a set of a predetermined number of consecutive slots),or every radio frame. In that case, the URLLC data reception settinginformation may be applied to a predetermined time resource.

Furthermore, the URLLC data reception setting information may beprovided in notification non-periodically. For example, in a case wherethe URLLC data reception setting information is provided innotification, the URLLC terminal 300 performs reception processing onthe basis of the URLLC data reception setting information provided innotification. On the other hand, in a case where the URLLC datareception setting information is not provided in notification, the URLLCterminal 300 performs the reception processing on the basis of thepreviously defined or set mapping pattern.

Third Example

The URLLC data reception setting information may be provided innotification by a combination of RRC signaling and DCI signaling. Forexample, the candidate of the mapping pattern that can be provided innotification by DCI signaling described in the second example above isset by RRC signaling. Note that, even in a case where the setting isperformed cell-specifically by RRC signaling, the DCI signaling may beprovided in notification UE-group-specifically or UE-specifically.

Hereinafter, specific examples will be described.

For example, three mapping pattern candidates that can be adopted areset cell-specifically by RRC signaling. Then, information indicatingwhich mapping pattern is adopted among the candidates is provided innotification UE-specifically by DCI signaling. In addition to the threeset mapping pattern candidates, two-bit information (in other words,value or pattern) indicating any of four states including a case of notbeing punctured may be provided in notification by DCI signaling.

For example, one mapping pattern is UE-specifically set by RRCsignaling. One bit of information indicating two states including a casewhere the set mapping pattern is adopted and a case where puncturing isnot performed may be provided in notification by DCI signaling. Theinformation provided in notification by the DCI signaling may beinformation indicating whether dynamic resource sharing is performed.

Hereinafter, an example of the flow of the URLLC data communicationprocessing in the third example will be described with reference to FIG.10.

FIG. 10 is a sequence diagram showing an example of a flow of datacommunication processing of the URLLC performed in the system 1according to the present embodiment. The base station device 100 and theURLLC terminal 300 are involved in this sequence.

First, the base station device 100 transmits first URLLC data receptionsetting information to the URLLC terminal 300 by RRC signaling (stepS202). The first URLLC data reception setting information includes, forexample, information indicating three mapping pattern candidates thatcan be adopted. Next, the base station device 100 transmits controlinformation including second URLLC data reception setting information tothe URLLC terminal 300 by DCI signaling (step S204). The second URLLCdata reception setting information includes, for example, in addition tothree mapping pattern candidates, two-bit information indicating any offour states including a case where puncturing is not performed. Next,the base station device 100 transmits URLLC data assigned by the controlinformation (step S206). Then, the URLLC terminal 300 performs receptionprocessing on the basis of the first URLLC data reception settinginformation and the second URLLC data reception setting information, andtransmits response information for the received URLLC data to the basestation device 100 (step S208).

<3.2.2. Case Where RE Size is Different>

Hereinafter, a case where the size (in other words, subcarrier spacingand/or symbol length) differs between the eMBB RE and the URLL RE willbe described.

(1) Difference in RE Size

In the NR, signal waveforms of a plurality of types of subcarrierspacings are supported to correspond to various use cases and carrierfrequencies. For example, the NR supports subcarrier spacings of 3.75kHz, 7.5 kHz, 15 kHz, 30 kHz, 60 kHz, 120 kHz, 240 kHz and/or 480 kHz.Furthermore, the NR supports multiplexing of signal waveforms ofdifferent subcarrier spacings within one component carrier. Themultiplexing includes frequency domain multiplexing and time domainmultiplexing.

Then, even in a case where the subcarrier spacing used for the eMBB dataand the subcarrier spacing used for the URLLC data are different, theabove-described dynamic resource sharing may be supported. For example,a case can be considered in which the eMBB data is transmitted by asignal waveform of the subcarrier spacing of 15 kHz, and the eMBB datais transmitted by a signal waveform of the subcarrier spacing of 60 kHz.

In a case where the subcarrier spacings are different, the sizes of REare different. In the above example, the size of the URLLC RE is fourtimes the subcarrier spacing (in other words, wider) in the frequencydirection and ¼ the symbol length in the time direction (in other words,shorter) as compared with the eMBB. Such a case where RE sizes aredifferent will be described in detail with reference to FIG. 11.

FIG. 11 is a diagram showing an example of dynamic resource sharing fordata of different subcarrier spacings according to the presentembodiment. The horizontal axis in FIG. 11 is time, the vertical axis isfrequency, and one RB 40 is shown. In a case where the sizes of the REsare different between the eMBB data and the URLLC data, puncturing forthe URLLC data is preferably performed for all the URLLC REs includingthe resources corresponding to the eMBB DMRS. In the example shown inFIG. 11, the REs 42A and 42B of the URLLC including the resourcecorresponding to the RE 41C to which the eMBB DMRS is mapped arepunctured. Furthermore, the REs 42B and 42C of the URLLC including theresource corresponding to the RE 41D to which the eMBB DMRS is mappedare punctured.

(2) URLLC Data Reception Setting Information

The following describes the URLLC data reception setting information indynamic resource sharing in a case where RE sizes are different.

The recognition of the URLLC data reception setting information and thereception processing based on the URLLC data reception settinginformation are performed in a similar manner to the method described in<3.2.1. Case Where RE Sizes are the Same>. However, the contents of theURLLC data reception setting information may be different from <3.2.1.Case Where RE Sizes are the Same>. Therefore, the URLLC data receptionsetting information will be described below.

First Example

The URLLC data reception setting information may be information based onthe URLLC RE size (in other words, subcarrier spacing and/or symbollength). In other words, the URLLC data reception setting informationmay be provided in notification on the basis of the URLLC RE size. Inthis case, the URLLC terminal 300 does not have to recognize the mappingpattern and subcarrier spacing of the eMBB DMRS.

The URLLC data reception setting information based on the URLLC RE sizeis preferably set and/or provided in notification UE-specifically orUE-group-specifically. Furthermore, the UE group in this case is a setof UEs that receive data of the same subcarrier spacing.

Second Example

The URLLC data reception setting information may be information based ona predetermined RE size (in other words, predetermined subcarrierspacing and/or predetermined symbol length). In other words, the URLLCdata reception setting information may be provided in notification onthe basis of a predetermined RE size.

The predetermined RE size may be the same as or different from the URLLCRE size.

The predetermined RE size may be the eMBB RE size, or in other words,the size of the RE used in the eMBB DMRS. In this case, the URLLC datareception setting information is information indicating a mappingpattern of the eMBB DMRS.

The URLLC data reception information based on a predetermined RE sizemay be set and/or provided in notification cell-specifically in additionto UE-specifically and UE group-specifically.

The URLLC terminal 300 performs reception processing by puncturing allREs including the resource set and/or provided in notification by theURLLC data reception setting information in the second resource.

Here, the predetermined subcarrier spacing in the predetermined RE sizemay be any or a combination of the following.

First Example

The predetermined subcarrier spacing may be a subcarrier spacing setcell-specifically or UE-specifically by RRC signaling.

Second Example

The predetermined subcarrier spacing may be a subcarrier spacing usedfor transmission of a predetermined synchronization signal, apredetermined reference signal, or a physical broadcast channel (PBCH).For example, the subcarrier spacing of the third resource or the fourthresource may be the same as the subcarrier spacing used for transmissionof a predetermined synchronization signal, a predetermined referencesignal, or a broadcast channel. As a result, since it is not necessaryto explicitly provide notification of the subcarrier spacing of thethird resource or the fourth resource, overhead can be reduced. Notethat a predetermined synchronization signal, a predetermined referencesignal, or PBCH may be a synchronization signal, a reference signal, orPBCH corresponding to (in other words, associated or referred to) URLLCdata or a resource used for transmission of URLLC data.

Third Example

The predetermined subcarrier spacing is a predefined subcarrier spacing,and may be, for example, 15 kHz.

<3.2.3. CSI Feedback>

(1) Overview of CSI Feedback

In the NR, it is possible to realize optimal radio transmission byperforming link adaptation in consideration of the transmission linestate in downlink transmission. In link adaptation, the UE measures thetransmission line state in downlink using the reference signal formeasuring channel state information (CSI) transmitted from the basestation, generates CSI feedback information on the basis of themeasurement result, and reports (in other words, gives feedback) on theCSI feedback information to the base station.

Here, the UE generates CSI feedback information on the assumption thatdownlink data is transmitted under predetermined conditions.Specifically, the UE generates CSI feedback information for a case wherethe error rate is equal to or less than a predetermined value (forexample, 0.1) in downlink data transmission.

(2) CSI Feedback in a Case where Dynamic Resource Sharing is Performed

It is desirable that CSI feedback be implemented even in a case wheredynamic resource sharing is performed.

Therefore, the URLLC terminal 300 (for example, the reception processingunit 343) gives CSI feedback on the assumption that the second datachannel is mapped to the resource other than the third resource that isa part of the second resource in the second resource. This makes itpossible to realize optimal link adaptation. However, the resources usedto transmit URLLC data may not be known at the time of the CSI feedback.Therefore, in CSI feedback for the URLLC data, it is desirable to makean assumption regarding puncturing according to the occurrence frequencyof data of eMBB or URLLC, or the like.

Furthermore, the number of antenna ports to be punctured (or antennaport number) may be further defined in the assumption regardingpuncturing for the URLLC data in the CSI feedback. The number of antennaports to be punctured (or antenna port number) may be set through RRCsignaling or DCI signaling.

The assumption regarding puncturing for the URLLC data in the CSIfeedback may be any or a combination of the following.

First Example

The URLLC terminal 300 performs CSI feedback in consideration ofpuncturing indicated by setting information associated with a puncturingpattern set for data reception. Specifically, the URLLC terminal 300generates CSI feedback information for REs other than the REs for whichpuncturing is assumed, indicated by the puncturing pattern for datareception, among the REs of the second resource, and gives feedback.Note that the puncturing pattern set for data reception is thepuncturing pattern included in the above-described URLLC data receptionsetting information.

Second Example

The URLLC terminal 300 performs CSI feedback in consideration ofpuncturing indicated by setting information associated with a puncturingpattern for the CSI feedback. Specifically, the URLLC terminal 300generates CSI feedback information for REs other than the REs for whichpuncturing is assumed, indicated by the puncturing pattern for the CSIfeedback, among the REs of the second resource, and gives feedback.Here, the puncturing pattern for the CSI feedback may be set and/orprovided in notification independently of the puncturing pattern set fordata reception.

Hereinafter, an example of the flow of the CSI feedback processing inthe second example will be described with reference to FIG. 12.

FIG. 12 is a sequence diagram showing an example of a flow of CSIfeedback processing executed in the system 1 according to the presentembodiment. The base station device 100 and the URLLC terminal 300 areinvolved in this sequence.

First, the base station device 100 transmits setting informationassociated with a puncturing pattern for the CSI feedback to the URLLCterminal 300 by RRC signaling (step S302). Next, the base station device100 transmits a reference signal for the CSI feedback to the URLLCterminal 300 (step S304). Then, the URLLC terminal 300 performs CSIfeedback in consideration of puncturing indicated by setting informationassociated with a puncturing pattern for the CSI feedback (step S306).

Third Example

The URLLC terminal 300 performs CSI feedback in consideration of apredetermined puncturing pattern predefined.

The predetermined puncturing pattern defined in advance may include acase where puncturing is not performed. In a case where thepredetermined RE puncturing pattern indicates that puncturing is notperformed, the URLLC terminal 300 performs CSI feedback withoutconsidering the puncturing even in a case where puncturing for the URLLdata is actually performed.

4. Application Example

The technology according to the present disclosure can be applied tovarious products. For example, the base station device 100 may berealized as an evolved Node B (eNB) of any type, such as a macro eNB ora small eNB. The small eNB may be an eNB that covers a cell smaller thana macro cell, such as a pico eNB, a micro eNB, or a home (femto) eNB.Instead, the base station device 100 may be realized as another type ofbase station such as a Node B or a base transceiver station (BTS). Thebase station device 100 may include a main body (also referred to as abase station device) that controls wireless communication, and one ormore remote radio heads (RRHs) disposed at a location different from themain body. Furthermore, various types of terminals as described latermay operate as the base station device 100 by temporarily orsemi-permanently executing the base station function.

Furthermore, for example, each of the eMBB terminal 200 and the URLLCterminal 300 may be realized as a mobile terminal such as a smartphone,a tablet personal computer (PC), a notebook PC, a portable gameterminal, a portable/dongle type mobile router, or a digital camera, ora vehicle-mounted terminal such as a car navigation device. Furthermore,each of the eMBB terminal 200 and the URLLC terminal 300 may be realizedas a terminal (also referred to as a machine type communication (MTC)terminal) that performs machine to machine (M2M) communication.Moreover, each of the eMBB terminal 200 and the URLLC terminal 300 maybe a wireless communication module (for example, an integrated circuitmodule configured with one die) mounted on these terminals.

4.1. Application Example of Base Station Device First ApplicationExample

FIG. 13 is a block diagram showing a first example of a schematicconfiguration of the eNB to which the technology according to thepresent disclosure may be applied. The eNB 800 has one or more antennas810 and a base station device 820. Each antenna 810 and the base stationdevice 820 may be connected to each other via an RF cable.

Each of the antennas 810 has a single or a plurality of antenna elements(for example, a plurality of antenna elements constituting a MIMOantenna), and is used for transmission and reception of a wirelesssignal by the base station device 820. The eNB 800 may have a pluralityof antennas 810 as shown in FIG. 13, and the plurality of antennas 810may correspond to, for example, a plurality of frequency bands used bythe eNB 800. Note that FIG. 13 shows an example in which the eNB 800 hasthe plurality of antennas 810, the eNB 800 may have a single antenna810.

The base station device 820 includes a controller 821, a memory 822, anetwork interface 823 and a wireless communication interface 825.

The controller 821 may be, for example, a CPU or a DSP, and operatesvarious functions of the upper layer of the base station device 820. Forexample, the controller 821 generates a data packet from data in thesignal processed by the wireless communication interface 825, andtransfers the generated packet through the network interface 823. Thecontroller 821 may generate a bundled packet by bundling data from aplurality of baseband processors and transfer the generated bundledpacket.

Furthermore, the controller 821 may have a logical function forperforming control such as radio resource control, radio bearer control,mobility management, admission control, scheduling, or the like.Furthermore, the control may be performed in cooperation withneighboring eNBs or core network nodes. The memory 822 includes a RAMand a ROM, and stores programs executed by the controller 821 andvarious control data (for example, terminal list, transmission powerdata, scheduling data, and the like).

The network interface 823 is a communication interface for connectingthe base station device 820 to the core network 824. The controller 821may communicate with core network nodes or other eNBs via the networkinterface 823. In that case, the eNB 800 and the core network node oranother eNB may be connected to each other by a logical interface (forexample, an S1 interface or an X2 interface). The network interface 823may be a wired communication interface or a wireless communicationinterface for a wireless backhaul. In a case where the network interface823 is a wireless communication interface, the network interface 823 mayuse a higher frequency band for wireless communication than thefrequency band used by the wireless communication interface 825.

The wireless communication interface 825 supports any cellularcommunication scheme such as long term evolution (LTE) or LTE-Advanced,and provides a wireless connection to a terminal located in the cell ofthe eNB 800 via the antenna 810. The wireless communication interface825 may typically include a baseband (BB) processor 826, RF circuitry827, and the like. The BB processor 826 may perform, for example,coding/decoding, modulation/demodulation, multiplexing/demultiplexing,or the like, and performs various signal processing of each layer (forexample, L1, medium access control (MAC), radio link control (RLC), andpacket data convergence protocol (PDCP). The BB processor 826 may havesome or all of the logical functions described above instead of thecontroller 821. The BB processor 826 may be a module including a memorythat stores a communication control program, a processor that executesthe program, and a module including related circuits, and the functionof the BB processor 826 may be changed by updating the program.Furthermore, the module may be a card or a blade inserted into a slot ofthe base station device 820, or may be a chip mounted on the card or theblade. Meanwhile, the RF circuit 827 may include a mixer, a filter, anamplifier, and the like, and transmits and receives a wireless signalthrough the antenna 810.

The wireless communication interface 825 may include a plurality of BBprocessors 826 as shown in FIG. 13, and the plurality of BB processors826 may correspond to, for example, a plurality of frequency bands usedby the eNB 800. Furthermore, the wireless communication interface 825may include a plurality of RF circuits 827 as shown in FIG. 13, and theplurality of RF circuits 827 may correspond to, for example, a pluralityof antenna elements. Note that, although FIG. 13 shows an example inwhich the wireless communication interface 825 includes the plurality ofBB processors 826 and the plurality of RF circuits 827, the wirelesscommunication interface 825 may include a single BB processor 826 or asingle RF circuit 827.

In the eNB 800 shown in FIG. 13, one or more components (notificationunit 151, data channel transmission unit 153, and/or data channeltransmission unit 153) included in the processing unit 150 describedwith reference to FIG. 5 may be mounted in the wireless communicationinterface 825. Alternatively, at least a part of these components may bemounted in the controller 821. As one example, the eNB 800 may beequipped with a module including a part (for example, the BB processor826) or all of the wireless communication interface 825 and/or thecontroller 821, and one or more components may be mounted in the module.In this case, the module may store a program for causing the processorto function as the one or more components (in other words, a program forcausing the processor to execute the operation of the one or morecomponents), and execute the program. As another example, a program forcausing the processor to function as the one or more components may beinstalled in the eNB 800, and the wireless communication interface 825(for example, the BB processor 826) and/or the controller 821 mayexecute the program. As described above, the eNB 800, the base stationdevice 820, or the module may be provided as a device including the oneor more components, and a program for causing the processor to functionas the one or more components may be provided. Furthermore, the readablerecording medium in which the program described above is recorded may beprovided.

Furthermore, in the eNB 800 shown in FIG. 13, the wireless communicationunit 120 described with reference to FIG. 5 may be mounted in thewireless communication interface 825 (for example, the RF circuit 827).

Furthermore, the antenna unit 110 may be mounted on the antenna 810.Furthermore, the network communication unit 130 may be mounted in thecontroller 821 and/or the network interface 823. Furthermore, thestorage unit 140 may be mounted in the memory 822.

Second Application Example

FIG. 14 is a block diagram showing a second example of a schematicconfiguration of the eNB to which the technology according to thepresent disclosure may be applied. The eNB 830 includes one or moreantennas 840, a base station device 850, and an RRH 860. Each antenna840 and the RRH 860 may be connected to each other via an RF cable.Furthermore, the base station device 850 and the RRH 860 may beconnected to each other by a high speed line such as an optical fibercable.

Each of the antennas 840 has a single or a plurality of antenna elements(for example, a plurality of antenna elements constituting a MIMOantenna), and is used for transmission and reception of a wirelesssignal by the RRH 860. The eNB 830 may have a plurality of antennas 840as shown in FIG. 14, and the plurality of antennas 840 may correspondto, for example, a plurality of frequency bands used by the eNB 830.Note that FIG. 14 shows an example in which the eNB 830 has theplurality of antennas 840, the eNB 830 may have a single antenna 840.

The base station device 850 includes a controller 851, a memory 852, anetwork interface 853, a wireless communication interface 855, and aconnection interface 857. The controller 851, the memory 852, and thenetwork interface 853 are similar to the controller 821, the memory 822,and the network interface 823 described with reference to FIG. 13.

The wireless communication interface 855 supports any cellularcommunication scheme such as LTE or LTE-Advanced, and provides awireless connection to terminals located in a sector corresponding tothe RRH 860 via the RRH 860 and the antenna 840. The wirelesscommunication interface 855 may typically include a BB processor 856 orthe like. The BB processor 856 is similar to the BB processor 826described with reference to FIG. 13 except that the BB processor 856 isconnected to the RF circuit 864 of the RRH 860 via the connectioninterface 857. The wireless communication interface 855 may include aplurality of BB processors 856 as shown in FIG. 14, and the plurality ofBB processors 856 may correspond to, for example, a plurality offrequency bands used by the eNB 830, respectively. Note that, althoughFIG. 14 shows an example in which the wireless communication interface855 includes a plurality of BB processors 856, the wirelesscommunication interface 855 may include a single BB processor 856.

The connection interface 857 is an interface for connecting the basestation device 850 (wireless communication interface 855) to the RRH860. The connection interface 857 may be a communication module forcommunication on the high speed line that connects the base stationdevice 850 (wireless communication interface 855) and the RRH 860.

Furthermore, the RRH 860 includes a connection interface 861 and awireless communication interface 863.

The connection interface 861 is an interface for connecting the RRH 860(wireless communication interface 863) to the base station device 850.The connection interface 861 may be a communication module forcommunication on the high speed line.

The wireless communication interface 863 transmits and receives awireless signal via the antenna 840. The wireless communicationinterface 863 may typically include an RF circuit 864 and the like. TheRF circuit 864 may include a mixer, a filter, an amplifier, and thelike, and transmits and receives a wireless signal through the antenna840. The wireless communication interface 863 may include a plurality ofRF circuits 864 as shown in FIG. 14, and the plurality of RF circuits864 may correspond to, for example, a plurality of antenna elements,respectively. Note that, although FIG. 14 shows an example in which thewireless communication interface 863 includes the plurality of RFcircuits 864, the wireless communication interface 863 may include asingle RF circuit 864.

In the eNB 830 shown in FIG. 14, one or more components (notificationunit 151, data channel transmission unit 153, and/or data channeltransmission unit 153) included in the processing unit 150 describedwith reference to FIG. 5 may be mounted in the wireless communicationinterface 855 and/or the wireless communication interface 863.Alternatively, at least a part of these components may be mounted in thecontroller 851. As one example, the eNB 830 may be equipped with amodule including a part (for example, the BB processor 856) or all ofthe wireless communication interface 855 and/or the controller 851, andone or more components may be mounted in the module. In this case, themodule may store a program for causing the processor to function as theone or more components (in other words, a program for causing theprocessor to execute the operation of the one or more components), andexecute the program. As another example, a program for causing theprocessor to function as the one or more components may be installed inthe eNB 830, and the wireless communication interface 855 (for example,the BB processor 856) and/or the controller 851 may execute the program.As described above, the eNB 830, the base station device 850, or themodule may be provided as a device including the one or more components,and a program for causing the processor to function as the one or morecomponents may be provided. Furthermore, the readable recording mediumin which the program described above is recorded may be provided.

Furthermore, in the eNB 830 shown in FIG. 14, for example, the wirelesscommunication unit 120 described with reference to FIG. 5 may be mountedin the wireless communication interface 863 (for example, the RF circuit864). Furthermore, the antenna unit 110 may be mounted on the antenna840. Furthermore, the network communication unit 130 may be mounted inthe controller 851 and/or the network interface 853. Furthermore, thestorage unit 140 may be mounted in the memory 852.

4.2. Application Example of Terminal Device First Application Example

FIG. 15 is a block diagram showing an example of a schematicconfiguration of a smartphone 900 to which the technology according tothe present disclosure may be applied. The smartphone 900 includes aprocessor 901, a memory 902, a storage 903, an external connectioninterface 904, a camera 906, a sensor 907, a microphone 908, an inputdevice 909, a display device 910, a speaker 911, a wirelesscommunication interface 912, one or more antenna switches 915, one ormore antennas 916, a bus 917, a battery 918, and an auxiliary controller919.

The processor 901 may be, for example, a CPU or a system on chip (SoC),and controls functions of an application layer and other layers of thesmartphone 900. The memory 902 includes a RAM and a ROM, and storesprograms and data to be executed by the processor 901. The storage 903may include a storage medium such as a semiconductor memory or a harddisk. The external connection interface 904 is an interface forconnecting an external device such as a memory card or a universalserial bus (USB) device to the smartphone 900.

The camera 906 has an imaging element such as a charge coupled device(CCD) or a complementary metal oxide semiconductor (CMOS), and generatesa captured image. The sensor 907 may include, for example, a sensorgroup such as a positioning sensor, a gyro sensor, a geomagnetic sensor,and an acceleration sensor. The microphone 908 converts the sound inputto the smartphone 900 into a sound signal. For example, the input device909 includes a touch sensor, a keypad, a keyboard, a button, a switch,or the like for detecting a touch on the screen of the display device910, and accepts an operation or information input from the user. Thedisplay device 910 has a screen such as a liquid crystal display (LCD)or an organic light emitting diode (OLED) display, and displays anoutput image of the smartphone 900. The speaker 911 converts the soundsignal output from the smartphone 900 into sound.

The wireless communication interface 912 supports any cellularcommunication scheme such as LTE or LTE-Advanced to perform wirelesscommunication. The wireless communication interface 912 may typicallyinclude a BB processor 913, an RF circuit 914, and the like. The BBprocessor 913 may perform, for example, encoding/decoding,modulation/demodulation, multiplexing/demultiplexing, or the like, andperforms various signal processing for wireless communication.Meanwhile, the RF circuit 914 may include a mixer, a filter, anamplifier, and the like, and transmits and receives a wireless signalthrough the antenna 916. The wireless communication interface 912 may bea one-chip module in which the BB processor 913 and the RF circuit 914are integrated. The wireless communication interface 912 may include aplurality of BB processors 913 and a plurality of RF circuits 914 asshown in FIG. 15. Note that, although FIG. 15 shows an example in whichthe wireless communication interface 912 includes the plurality of BBprocessors 913 and the plurality of RF circuits 914, the wirelesscommunication interface 912 may include a single BB processor 913 or asingle RF circuit 914.

Moreover, in addition to the cellular communication system, the wirelesscommunication interface 912 may support other types of wirelesscommunication systems, such as a near field communication system, aproximity wireless communication system, or a wireless local areanetwork (LAN) system. In that case, a BB processor 913 and an RF circuit914 for each wireless communication system may be included.

Each of the antenna switches 915 switches the connection destination ofthe antenna 916 among a plurality of circuits (for example, circuits fordifferent wireless communication systems) included in the wirelesscommunication interface 912.

Each of the antennas 916 has a single or a plurality of antenna elements(for example, a plurality of antenna elements constituting a MIMOantenna), and is used for transmission and reception of a wirelesssignal by the wireless communication interface 912. The smartphone 900may have a plurality of antennas 916 as shown in FIG. 15. Note thatalthough FIG. 15 shows an example in which the smartphone 900 has theplurality of antennas 916, the smartphone 900 may have a single antenna916.

Moreover, the smartphone 900 may include an antenna 916 for eachwireless communication scheme. In that case, the antenna switch 915 maybe omitted from the configuration of the smartphone 900.

The bus 917 connects a processor 901, a memory 902, a storage 903, anexternal connection interface 904, a camera 906, a sensor 907, amicrophone 908, an input device 909, a display device 910, a speaker911, a wireless communication interface 912, and an auxiliary controller919 with each other. The battery 918 supplies power to each block of thesmartphone 900 shown in FIG. 15 through a power supply line partiallyshown by a broken line in the drawing. For example, the auxiliarycontroller 919 operates the minimum necessary functions of thesmartphone 900 in a sleep mode.

In the smartphone 900 shown in FIG. 15, one or more components (theacquisition unit 241 and/or the reception processing unit 243) includedin the processing unit 240 described with reference to FIG. 6 may bemounted in the wireless communication interface 912. Furthermore, in thesmartphone 900 shown in FIG. 15, one or more components (the acquisitionunit 341 and/or the reception processing unit 343) included in theprocessing unit 340 described with reference to FIG. 7 may be mounted inthe wireless communication interface 912. Alternatively, at least a partof these components may be mounted in the processor 901 or the auxiliarycontroller 919. As one example, the smartphone 900 may be equipped witha module including a part (for example, the BB processor 913) or all ofthe wireless communication interface 912, the processor 901, and/or theauxiliary controller 919, and one or more components may be mounted inthe module. In this case, the module may store a program for causing theprocessor to function as the one or more components (in other words, aprogram for causing the processor to execute the operation of the one ormore components), and execute the program. As another example, a programfor causing the processor to function as the one or more components maybe installed in the smartphone 900, and the wireless communicationinterface 912 (for example, the BB processor 913), the processor 901,and/or the auxiliary controller 919 may execute the program. Asdescribed above, the smartphone 900 or the module may be provided as adevice including the one or more components, and a program for causingthe processor to function as the one or more components may be provided.Furthermore, the readable recording medium in which the programdescribed above is recorded may be provided.

Furthermore, in the smartphone 900 shown in FIG. 15, for example, thewireless communication unit 220 described with reference to FIG. 6 orthe wireless communication unit 320 described with reference to FIG. 7may be mounted in the wireless communication interface 912 (for example,the RF circuit 914). Furthermore, the antenna unit 210 or the antennaunit 310 may be mounted on the antenna 916. Furthermore, the storageunit 230 or the storage unit 330 may be mounted in the memory 902.

Second Application Example

FIG. 16 is a block diagram showing an example of a schematicconfiguration of a car navigation device 920 to which the technologyaccording to the present disclosure may be applied. The car navigationdevice 920 includes a processor 921, a memory 922, a global positioningsystem (GPS) module 924, a sensor 925, a data interface 926, a contentplayer 927, a storage medium interface 928, an input device 929, adisplay device 930, a speaker 931, a wireless communication interface933, one or more antenna switches 936, one or more antennas 937, and abattery 938.

The processor 921 may be, for example, a CPU or an SoC, and controls thenavigation function and other functions of the car navigation device920. The memory 922 includes a RAM and a ROM, and stores programs anddata to be executed by the processor 921.

The GPS module 924 uses a GPS signal received from a GPS satellite tomeasure the location (for example, latitude, longitude, and altitude) ofthe car navigation device 920. The sensor 925 may include, for example,a sensor group such as a gyro sensor, a geomagnetic sensor, and an airpressure sensor. The data interface 926 is connected to the in-vehiclenetwork 941 via a terminal (not shown), for example, and acquires datagenerated on the vehicle side such as vehicle speed data.

The content player 927 reproduces the content stored in the storagemedium (for example, CD or DVD) inserted in the storage medium interface928. For example, the input device 929 includes a touch sensor, abutton, a switch, or the like for detecting a touch on the screen of thedisplay device 930, and accepts an operation or information input fromthe user. The display device 930 has a screen such as an LCD or an OLEDdisplay, and displays a navigation function or an image of content to bereproduced. The speaker 931 outputs the navigation function or the soundof the content to be reproduced.

The wireless communication interface 933 supports any cellularcommunication scheme such as LTE or LTE-Advanced to perform wirelesscommunication. The wireless communication interface 933 may typicallyinclude a BB processor 934, an RF circuit 935, and the like. The BBprocessor 934 may perform, for example, encoding/decoding,modulation/demodulation, multiplexing/demultiplexing, or the like, andperforms various signal processing for wireless communication.Meanwhile, the RF circuit 935 may include a mixer, a filter, anamplifier, and the like, and transmits and receives a wireless signalthrough the antenna 937. The wireless communication interface 933 may bea one-chip module in which the BB processor 934 and the RF circuit 935are integrated. The wireless communication interface 933 may include aplurality of BB processors 934 and a plurality of RF circuits 935 asshown in FIG. 16. Note that, although FIG. 16 shows an example in whichthe wireless communication interface 933 includes the plurality of BBprocessors 934 and the plurality of RF circuits 935, the wirelesscommunication interface 933 may include a single BB processor 934 or asingle RF circuit 935.

Moreover, in addition to the cellular communication system, the wirelesscommunication interface 933 may support other types of wirelesscommunication systems, such as a near field communication system, aproximity wireless communication system, or a wireless LAN system. Inthat case, a BB processor 934 and an RF circuit 935 for each wirelesscommunication system may be included.

Each of the antenna switches 936 switches the connection destination ofthe antenna 937 among a plurality of circuits (for example, circuits fordifferent wireless communication systems) included in the wirelesscommunication interface 933.

Each of the antennas 937 has a single or a plurality of antenna elements(for example, a plurality of antenna elements constituting a MIMOantenna), and is used for transmission and reception of a wirelesssignal by the wireless communication interface 933. The car navigationdevice 920 may have a plurality of antennas 937 as shown in FIG. 16.Note that although FIG. 16 shows an example in which the car navigationdevice 920 has the plurality of antennas 937, the car navigation device920 may have a single antenna 937.

Moreover, the car navigation device 920 may include an antenna 937 foreach wireless communication scheme. In that case, the antenna switch 936may be omitted from the configuration of the car navigation device 920.

The battery 938 supplies power to each block of the car navigationdevice 920 shown in FIG. 16 through a power supply line partially shownby a broken line in the drawing. Furthermore, the battery 938accumulates power supplied from the vehicle side.

In the car navigation device 920 shown in FIG. 16, one or morecomponents (the acquisition unit 241 and/or the reception processingunit 243) included in the processing unit 240 described with referenceto FIG. 6 may be mounted in the wireless communication interface 933.Furthermore, in the car navigation device 920 shown in FIG. 16, one ormore components (the acquisition unit 341 and/or the receptionprocessing unit 343) included in the processing unit 340 described withreference to FIG. 7 may be mounted in the wireless communicationinterface 933. Alternatively, at least a part of these components may bemounted in the processor 921. As one example, the car navigation device920 may be equipped with a module including a part (for example, the BBprocessor 934) or all of the wireless communication interface 933 and/orthe processor 921, and one or more components may be implemented in themodule. In this case, the module may store a program for causing theprocessor to function as the one or more components (in other words, aprogram for causing the processor to execute the operation of the one ormore components), and execute the program. As another example, a programfor causing the processor to function as the one or more components maybe installed in the car navigation device 920, and the wirelesscommunication interface 933 (for example, the BB processor 934) and/orthe processor 921 may execute the program. As described above, the carnavigation device 920 or the module may be provided as a deviceincluding the one or more components, and a program for causing theprocessor to function as the one or more components may be provided.Furthermore, the readable recording medium in which the programdescribed above is recorded may be provided.

Furthermore, in the car navigation device 920 shown in FIG. 16, forexample, the wireless communication unit 220 described with reference toFIG. 6 or the wireless communication unit 320 described with referenceto FIG. 7 may be mounted in the wireless communication interface 933(for example, the RF circuit 935). Furthermore, the antenna unit 210 orthe antenna unit 310 may be mounted on the antenna 937. Furthermore, thestorage unit 230 or the storage unit 330 may be mounted in the memory922.

Furthermore, the technology according to the present disclosure may berealized as an in-vehicle system (or vehicle) 940 including one or moreblocks of the car navigation device 920, the in-vehicle network 941, anda vehicle-side module 942. The vehicle-side module 942 generates vehicleside data such as vehicle speed, engine speed, or failure information,and outputs the generated data to the in-vehicle network 941.

5. Conclusion

An embodiment of the present disclosure has been described above indetail with reference to FIGS. 1 to 16. As described above, the eMBBterminal 200 acquires the first control information provided innotification from the base station device 100, and on the basis of thefirst control information, performs reception processing of the eMBBdata and the eMBB DMRS scheduled to the first resource. Furthermore, theeMBB terminal 200 acquires the second control information provided innotification from the base station device 100, and on the basis of thesecond control information, performs reception processing of the eMBBdata that is mapped to a resource other than the second resource that isa part of the first resource in the first resource on the assumptionthat the eMBB DMRS is mapped to the first resource including the secondresource. Even in a case where the second resource that is a part of thefirst resource is punctured, the base station device 100 maps the eMBBDMRS to the first resource including the second resource. Therefore, theeMBB terminal 200 can receive the eMBB DMRS without loss and use theeMBB DMRS for demodulating eMBB data. This makes it possible to avoidthe characteristic degradation of the eMBB data due to puncturing.

Furthermore, the URLLC terminal 300 acquires the third controlinformation provided in notification from the base station device 100,and performs reception processing of the second data channel scheduledto the second resource that is a part of the first resource on the basisof the third control information. In particular, the URLLC terminal 300performs reception processing on the assumption that the second datachannel is mapped to the resource other than the third resource that isa part of the second resource in the second resource. More simply, theURLLC terminal 300 performs reception processing of the URLLC datatransmitted in the second resource except for the third resourcecorresponding to the resource to which the eMBB DMRS is mapped. Asdescribed above, the URLLC terminal 300 can avoid characteristicdegradation of the URLLC data by excluding the eMBB DMRS from receptiontargets.

While preferred embodiment of the present disclosure has been describedin detail with reference to the accompanying drawings, the technicalscope of the present disclosure is not limited to such examples. It isobvious that various variations and modifications can be conceivedwithin the scope of the technical idea described in the claims by aperson having ordinary knowledge in the field of technology to which thepresent disclosure belongs, and, of course, it is understood that thesevariations and modifications belong to the technical scope of presentdisclosure.

For example, although eMBB and URLLC are mentioned as an example of twocommunication standards in which dynamic resource sharing is performedin the above-described embodiment, the present technology is not limitedto this example. The present technology is applicable for dynamicresource sharing between any two communication standards.

Furthermore, the processing described using the sequence diagram in thepresent specification may not necessarily be performed in theillustrated order. Some processing steps may be performed in parallel.Furthermore, additional processing steps may be employed and someprocessing steps may be omitted.

Furthermore, the effects described in the present specification aremerely illustrative or exemplary, and are not limitative. That is, thetechnique according to the present disclosure can exhibit other effectsobvious to those skilled in the art from the description of the presentspecification together with the effects described above or instead ofthe effects described above.

Note that the following configuration is also within the technical scopeof the present disclosure.

(1)

A terminal device including:

an acquisition unit that acquires first control information and secondcontrol information provided in notification from a base station device;and

a reception processing unit that performs reception processing of afirst data channel scheduled to a first resource, and a reference signalfor demodulating the first data channel, on the basis of the firstcontrol information,

in which the reception processing unit performs the reception processingof the first data channel mapped to a resource other than a secondresource that is a part of the first resource in the first resource onthe basis of the second control information on the assumption that thereference signal is mapped to the first resource including the secondresource.

(2)

The terminal device according to (1) described above, in which a seconddata channel scheduled to another device terminal that communicates withthe base station device is mapped to the second resource.

(3)

The terminal device according to (1) or (2) described above, in whichthe second control information is transmitted at a time later than thefirst control information.

(4)

A terminal device including:

an acquisition unit that acquires third control information provided innotification from a base station device; and

a reception processing unit that performs reception processing of asecond data channel scheduled to a second resource that is a part of afirst resource on the basis of the third control information,

in which the reception processing unit performs the reception processingon the assumption that the second data channel is mapped to a resourceother than a third resource that is a part of the second resource in thesecond resource.

(5)

The terminal device according to (4) described above, in which the thirdresource includes a fourth resource to which a reference signal fordemodulating a first data channel mapped to a resource other than thesecond resource in the first resource is mapped.

(6)

The terminal device according to (4) or (5) described above,

in which the acquisition unit acquires fourth control informationprovided in notification from the base station device, and

the fourth control information indicates the third resource.

(7)

The terminal device according to any one of (4) to (6) described above,in which a subcarrier spacing of the third resource is the same as asubcarrier spacing used for transmission of a predeterminedsynchronization signal, a predetermined reference signal or a broadcastchannel.

(8)

The terminal device according to any one of (4) to (7) described above,in which the third resource is predefined.

(9)

The terminal device according to (5) described above or any one of (6)to (8) described above depending from (5) described above, in which thesubcarrier spacing of the third resource is the same as a subcarrierspacing of the fourth resource.

(10)

The terminal device according to (5) described above or any one of (6)to (8) described above depending from (5) described above, in which thesubcarrier spacing of the third resource is different from a subcarrierspacing of the fourth resource.

(11)

The terminal device according to any one of (4) to (10) described above,in which the reception processing unit gives CSI feedback on the basisof the assumption.

(12)

A base station device including:

a notification unit that notifies a first terminal device of firstcontrol information associated with a first resource for the firstterminal device, and second control information associated with a secondresource for a second terminal device that is a part of the firstresource;

a data channel transmission unit that maps a first data channel to aresource other than the second resource in the first resource whilescheduling the first data channel to the first resource; and

a reference signal transmission unit that maps a reference signal fordemodulating the first data channel to the first resource including thesecond resource.

(13)

A base station device including:

a notification unit that notifies a second terminal device of thirdcontrol information associated with a second resource for the secondterminal device that is a part of a first resource for a first terminaldevice; and

a data channel transmission unit that maps a second data channel to aresource other than a third resource that is a part of the secondresource in the second resource while scheduling the second data channelto the second resource.

(14)

A method including:

acquiring first control information and second control informationprovided in notification from a base station device; and

performing, by a processor, reception processing of a first data channelscheduled to a first resource, and a reference signal for demodulatingthe first data channel, on the basis of the first control information,

in which the performing the reception processing includes performing thereception processing of the first data channel mapped to a resourceother than a second resource that is a part of the first resource in thefirst resource on the basis of the second control information on theassumption that the reference signal is mapped to the first resourceincluding the second resource.

(15)

A method including:

acquiring third control information provided in notification from a basestation device; and

performing, by a processor, reception processing of a second datachannel scheduled to a second resource that is a part of a firstresource on the basis of the third control information,

in which the performing the reception processing includes performing thereception processing on the assumption that the second data channel ismapped to a resource other than a third resource that is a part of thesecond resource in the second resource.

(16)

A method including:

notifying a first terminal device of first control informationassociated with a first resource for the first terminal device, andsecond control information associated with a second resource for asecond terminal device that is a part of the first resource;

mapping, by a processor, a first data channel to a resource other thanthe second resource in the first resource while scheduling the firstdata channel to the first resource; and

mapping a reference signal for demodulating the first data channel tothe first resource including the second resource.

(17)

A method including:

notifying a second terminal device of third control informationassociated with a second resource for the second terminal device that isa part of a first resource for a first terminal device; and

mapping, by a processor, a second data channel to a resource other thana third resource that is a part of the second resource in the secondresource while scheduling the second data channel to the secondresource.

(18)

A recording medium in which a program is recorded for causing a computerto function as:

an acquisition unit that acquires first control information and secondcontrol information provided in notification from a base station device;and

a reception processing unit that performs reception processing of afirst data channel scheduled to a first resource, and a reference signalfor demodulating the first data channel, on the basis of the firstcontrol information,

in which the reception processing unit performs the reception processingof the first data channel mapped to a resource other than a secondresource that is a part of the first resource in the first resource onthe basis of the second control information on the assumption that thereference signal is mapped to the first resource including the secondresource.

(19)

A recording medium in which a program is recorded for causing a computerto function as:

an acquisition unit that acquires third control information provided innotification from a base station device; and

a reception processing unit that performs reception processing of asecond data channel scheduled to a second resource that is a part of afirst resource on the basis of the third control information,

in which the reception processing unit performs the reception processingon the assumption that the second data channel is mapped to a resourceother than a third resource that is a part of the second resource in thesecond resource.

(20)

A recording medium in which a program is recorded for causing a computerto function as:

a notification unit that notifies a first terminal device of firstcontrol information associated with a first resource for the firstterminal device, and second control information associated with a secondresource for a second terminal device that is a part of the firstresource;

a data channel transmission unit that maps a first data channel to aresource other than the second resource in the first resource whilescheduling the first data channel to the first resource; and

a reference signal transmission unit that maps a reference signal fordemodulating the first data channel to the first resource including thesecond resource.

(21)

A recording medium in which a program is recorded for causing a computerto function as:

a notification unit that notifies a second terminal device of thirdcontrol information associated with a second resource for the secondterminal device that is a part of a first resource for a first terminaldevice; and

a data channel transmission unit that maps a second data channel to aresource other than a third resource that is a part of the secondresource in the second resource while scheduling the second data channelto the second resource.

REFERENCE SIGNS LIST

-   1 System-   11 Cell-   20 Core network-   30 PDN-   100 Base station device-   102 Component-   110 Antenna unit-   120 Wireless communication unit-   130 Network communication unit-   140 Storage unit-   150 Processing unit-   151 Notification unit-   153 Data channel transmission unit-   155 Reference signal transmission unit-   200 Terminal device, eMBB terminal-   210 Antenna unit-   220 Wireless communication unit-   230 Storage unit-   240 Processing unit-   241 Acquisition unit-   243 Reception processing unit-   300 Terminal device, URLLC terminal-   310 Antenna unit-   320 Wireless communication unit-   330 Storage unit-   340 Processing unit-   341 Acquisition unit-   343 Reception processing unit

1. A terminal device comprising: an acquisition unit that acquires firstcontrol information and second control information provided innotification from a base station device; and a reception processing unitthat performs reception processing of a first data channel scheduled toa first resource, and a reference signal for demodulating the first datachannel, on a basis of the first control information, wherein thereception processing unit performs the reception processing of the firstdata channel mapped to a resource other than a second resource that is apart of the first resource in the first resource on a basis of thesecond control information on an assumption that the reference signal ismapped to the first resource including the second resource.
 2. Theterminal device according to claim 1, wherein a second data channelscheduled to another terminal device that communicates with the basestation device is mapped to the second resource.
 3. The terminal deviceaccording to claim 1, wherein the second control information istransmitted at a time later than the first control information.
 4. Aterminal device comprising: an acquisition unit that acquires thirdcontrol information provided in notification from a base station device;and a reception processing unit that performs reception processing of asecond data channel scheduled to a second resource that is a part of afirst resource on a basis of the third control information, wherein thereception processing unit performs the reception processing on anassumption that the second data channel is mapped to a resource otherthan a third resource that is a part of the second resource in thesecond resource.
 5. The terminal device according to claim 4, whereinthe third resource includes a fourth resource to which a referencesignal for demodulating a first data channel mapped to a resource otherthan the second resource in the first resource is mapped.
 6. Theterminal device according to claim 4, wherein the acquisition unitacquires fourth control information provided in notification from thebase station device, and the fourth control information indicates thethird resource.
 7. The terminal device according to claim 4, wherein asubcarrier spacing of the third resource is the same as a subcarrierspacing used for transmission of a predetermined synchronization signal,a predetermined reference signal, or a broadcast channel.
 8. Theterminal device according to claim 4, wherein the third resource ispredefined.
 9. The terminal device according to claim 5, wherein thesubcarrier spacing of the third resource is the same as a subcarrierspacing of the fourth resource.
 10. The terminal device according toclaim 5, wherein the subcarrier spacing of the third resource isdifferent from a subcarrier spacing of the fourth resource.
 11. Theterminal device according to claim 4, wherein the reception processingunit gives CSI feedback on a basis of the assumption.
 12. A base stationdevice comprising: a notification unit that notifies a first terminaldevice of first control information associated with a first resource forthe first terminal device, and second control information associatedwith a second resource for a second terminal device that is a part ofthe first resource; a data channel transmission unit that maps a firstdata channel to a resource other than the second resource in the firstresource while scheduling the first data channel to the first resource;and a reference signal transmission unit that maps a reference signalfor demodulating the first data channel to the first resource includingthe second resource.
 13. A base station device comprising: anotification unit that notifies a second terminal device of thirdcontrol information associated with a second resource for the secondterminal device that is a part of a first resource for a first terminaldevice; and a data channel transmission unit that maps a second datachannel to a resource other than a third resource that is a part of thesecond resource in the second resource while scheduling the second datachannel to the second resource.
 14. A method comprising: acquiring firstcontrol information and second control information provided innotification from a base station device; and performing, by a processor,reception processing of a first data channel scheduled to a firstresource, and a reference signal for demodulating the first datachannel, on a basis of the first control information, wherein theperforming the reception processing includes performing the receptionprocessing of the first data channel mapped to a resource other than asecond resource that is a part of the first resource in the firstresource on a basis of the second control information on an assumptionthat the reference signal is mapped to the first resource including thesecond resource.
 15. A method comprising: acquiring third controlinformation provided in notification from a base station device; andperforming, by a processor, reception processing of a second datachannel scheduled to a second resource that is a part of a firstresource, on a basis of the third control information, wherein theperforming the reception processing includes performing the receptionprocessing on an assumption that the second data channel is mapped to aresource other than a third resource that is a part of the secondresource in the second resource.
 16. A method comprising: notifying afirst terminal device of first control information associated with afirst resource for the first terminal device, and second controlinformation associated with a second resource for a second terminaldevice that is a part of the first resource; mapping, by a processor, afirst data channel to a resource other than the second resource in thefirst resource while scheduling the first data channel to the firstresource; and mapping a reference signal for demodulating the first datachannel to the first resource including the second resource.
 17. Amethod comprising: notifying a second terminal device of third controlinformation associated with a second resource for the second terminaldevice that is a part of a first resource for a first terminal device;and mapping, by a processor, a second data channel to a resource otherthan a third resource that is a part of the second resource in thesecond resource while scheduling the second data channel to the secondresource.
 18. A recording medium in which a program is recorded forcausing a computer to function as: an acquisition unit that acquiresfirst control information and second control information provided innotification from a base station device; and a reception processing unitthat performs reception processing of a first data channel scheduled toa first resource, and a reference signal for demodulating the first datachannel, on a basis of the first control information, wherein thereception processing unit performs the reception processing of the firstdata channel mapped to a resource other than a second resource that is apart of the first resource in the first resource on a basis of thesecond control information on an assumption that the reference signal ismapped to the first resource including the second resource.
 19. Arecording medium in which a program is recorded for causing a computerto function as: an acquisition unit that acquires third controlinformation provided in notification from a base station device; and areception processing unit that performs reception processing of a seconddata channel scheduled to a second resource that is a part of a firstresource, on a basis of the third control information, wherein thereception processing unit performs the reception processing on anassumption that the second data channel is mapped to a resource otherthan a third resource that is a part of the second resource in thesecond resource.
 20. A recording medium in which a program is recordedfor causing a computer to function as: a notification unit that notifiesa first terminal device of first control information associated with afirst resource for the first terminal device, and second controlinformation associated with a second resource for a second terminaldevice that is a part of the first resource; a data channel transmissionunit that maps a first data channel to a resource other than the secondresource in the first resource while scheduling the first data channelto the first resource; and a reference signal transmission unit thatmaps a reference signal for demodulating the first data channel to thefirst resource including the second resource.
 21. A recording medium inwhich a program is recorded for causing a computer to function as: anotification unit that notifies a second terminal device of thirdcontrol information associated with a second resource for the secondterminal device that is a part of a first resource for a first terminaldevice; and a data channel transmission unit that maps a second datachannel to a resource other than a third resource that is a part of thesecond resource in the second resource while scheduling the second datachannel to the second resource.